Selby, M. (1971). The surface of the earth: Climate soils and vegetation. Cassell & Co.
Cita Chicago (17th ed.)Selby, M.J. The Surface of the Earth: Climate Soils and Vegetation. London: Cassell & Co, 1971.
Cita MLA (9th ed.)Selby, M.J. The Surface of the Earth: Climate Soils and Vegetation. Cassell & Co, 1971.
Atenció: Aquestes cites poden no estar 100% correctes.